Rotary filter.



B.. P. AKINS.'

ROTARY FILTER.

APPLIoATIoN FILED JAN. 2o, 1911.

1,059,327. ,Patented Apr. 15, 1913.

. l yl SHEETS-SHEET 1.

54 .33 52 l 50 Zzgl, 7

W/T/VESSES:

ATTORNEYS,

R. P. AKINS.`

ROTARY FILTER. A APPLIOA'IIN FILED JAN. 20I 1911.

1,059,327n Patented Apr. 15,1913.

A TTORNEYS,

R. P. AKINS.

ROTARY FILTER.

APPLIOATION FILED JAN. 2o, 1911.

1,059,327. Patented Apr. 15, 1913.

8 8HBETB-SHEBT 4.

LEVEL OFPl/LP/N TANK WTNESSES: NVENTOR.

Randall P Alrzros,

' A. @Mac .www

VACUUM R. P. AKINS.

ROTARY FILTER.

APPLIoATIoN FILED 11111.20, 1911.

1,059,327. Patented Apr. 15, 1913.

6 SHEETS-SHEET 5.

WTNESSES: NVENTOR.

@00 k7 E Randa/ZZ Z3, AJELS,

A TTORNEYS,

R. P. AKINS.

ROTARY FILTER.

APPLIoATIoN FILED 1111.20, 1911.

Patented Apr. 15,1913.

WjTNESSEs.-

Z. i Rancid/ZZ .R AJcL'Tl/S,

ATTORNEYS the ltering media and how UNITED l STATES PATENT oEEIoE.

RANDALL iP.. AKINS,` OF DENVER, COLORADO, ASSIGNOR TO COLORADO IRON WORKS CO., OF DENVER, COLORADO.

. ROTARY FILTER.

To all 'whom it may concern:

Be itknown that I, RANDALL P. AKINS, a citizen of the United States, residing at Denver, Colorado, have invented certain new and useful Improvements in Rotary Filters, of which thelfollowing is a specification.

My invention relates to that type of `rev'- oluble filters for the treatment. of ore and liquids in which a rotary carrier has thereon a number of filter pans which are carried in the revolution of the carrier into and outof the tank,` the filter pans being subjected to suction` pressure as theyare passing through the tank, and being subjected to air pressure at or near the point of discharge for assisting in the removal ofthe material collected from 4the tank, and the invention consists in the [features of construction and combination and arrangement of parts hereinafter described and particularly pointed out in the appended claims.

In the accompanying `drawings Figure 1 is an elevation of ay carrier partly immersed in a tank and embodying features of the invention, this view beingnth'e nature of a diagram, and of parts in section, the view being taken from the driven end of the carrier.` Fig. 2 'is av sectional view of the carrier along its axis, av portion beinvf shown in elevation.' Fig. 3 is an enlarged sectional view of aportion of the carrier rim showing one of the filter compartments or pans. Fig.l 4 is a plan view of a portion of the periphery of the carrier, this view embracing the area of said periphery, constituting one of the filter compartments, t-he filtering media being omitted. Fig. 5 is aview similar to Fig. 4 of a portion of the periphery of the carrier, this view being in the nature of adiagram to show the different layers of material covering the surface of the carrier or the compartment at this point. Fig. 6 shows in section a batten with a metallic plate and the scre'w for securing these arts to the carrier for holding a portion o the filtering media and for the attachment .of thesecuring wires or metal bands. Fig. 7 is aview of the end portion of one of the wooden strips of which the periphery ofthe carrier is made up, and showing in section the same is held near the ends of the said wooden strips. or atthedges of the peripheral surface zof the carrier; Fig. 8 is a view of one of the Specification of Letters Patent.

appi'i'caaon mea January 2o, 1911. serial No. 603,734.

l ber wear Patented Apr. 15, 1913.

wooden strips which divide the surface of the carjrier `Into the compartments or filterlng pans. Fig. 9 is a side view of the lcarrier with the various pipe connections leadlng to the filter pans. Fig. 10 isa side view of the spider looking from the right of Fig. -2, with one of the valve members. Fig. 11 ls a sectional view of Fig. 10. Fig. 12 1s an mside face view of the stationary valve member. Fig.`13 is a sectional view of Figi 12. Fig. 14 is a face view ofthe valve memlate carried by the hub of the splder. 1g. 15 is a sectional view of Fig. 14.. Fig. 16 is a diagrammatic view of the carrier, tank and va ve members. Fig. 17 and 18 are detail views.

The .carrier 1 is mounted upon an axle 2 which is driven by a Aworm wheel 3 and a worm 4, the ,latter being on a shaft 5 driven in any suitable manner by gearing at 6, Fig. 1. The carrier comprises a rim or cylinder made'up of a number of strips of wood, 7, Fig. 3, preferably doweled together, as at 8, these strips being supported by bearing rims 7 preferably of metal, three of these being shown in Fig. 2, one at each end of the carrier and one at the center. these bearing rims being, in turn, carried by spokes 9, the inner threaded ends' of which are attached to the spider casting or hub v10 by the nuts 11, Figs. 2, 9 and 10. This drum or cylinder carries a number of `division strips 12 extending parallel with the axis and projecting from the surface of the woodenistrips 7 ,-these strips 12 formingthe division walls betweenthe filter sections or compartments, a`s shown in Fig. 3. i Between these division strips short lower strips 13 are fixed to the surface of the drum, and spaced apart, as shown in Fig. 4, having also spaces .14 between their ends, and these` lower stripsare arranged inclined in respect to the direction of revolution of the carrier.V They divide up the surface of the filter compartment or pan forming circultous passages along the said surface, and Y lze I to the metal portion of the batten.

`outer covering of wire is soldered tothe thin met-al strips 1'8 to retain the wire covering in position and to'prevent the wire from unwinding in case of breakage of the same at any point. The function of this wire is to hold the filtering media in position on the carrier 0r sections. This covering wire need not, however, be in the form o f a continuous wire running around .the drum, but may be broken at the point of soldermg to the metal strip on the batten. In applying this covering Wire, it may be wound continuously and then broken at the point of` soldering.

Pipes 20 and 21 connect with the filter compartments or pans atdifferent points, as shown in Figs. 2 and 4,. and also in Fig. 9, and these pipes extend toward the center ofthe carrier and connect with pipes 22 which eX-;

tend `along the shaft through the `hub -10' of the spider 10, being-screw threaded mto the end wall.23 of said hub, and thus communicating with ports 24 extending `through the wall 23 and with ports'in a plate 25 the end wall of the hub of the spider at. 23, form, in effect, one member of a controlling valve, that is,`the movable member. It will screwed `within the recess at lthe outer end of the hub of the spider, this plate 25 constituting a Wear plate which may be replaced when worn. This pla-te 25,v together with be understood, however, that I do not limit myself to the details `of construction just described, as this movable valve member may be otherwise constructed.Y Within the recess at the end'of the hub of the spider, I.

arrange a stationary valve member `consist- ,ing of the plate shown in F lgs. 12-.and 13. This stationary valve member or plate has a 'I port 26 connected with a recess 26 and ports 27 `and 28 connected with recesses 2 7 and 28 formed in the' face of the plate, vand also a port 29. Suitable pipe connections lead to these ports and are connected therewith by' screw threads indicated in Fig. 13, thepipes connected with the. ports 26, 27 and 28 extending to suction means, whilethe pipe ofA the.4 pont 29 connects with air pressure means. .In Fig. 16, which is a diagram of theapparatus, these ports are indicated, and the circle indicates the carrier moving in the direction of the arrow. This carrier is submerged in thev bath of the tank, and the points where the pans or filter compartments ony the carrier are subjected to the suctlon dor vacuum pressure are indicated at A, B, and-C. At A the suction is derived through the'port 26 when .the ports in the rotating member of the valve, z'. e., the ported portion of the hub of the spider or the wear plate 25 registers with the' port 26 or with the recess 26 connected with the said port and extending to each side of the same. The submerged filter pan will therefore be collecting the material from the tank, `while the solution will be drawn through the forming cake, and this being rich in gold, will be delivered to the precipitation plant for the extraction of the gold through the pipe connected with the port 26.

At the top of the carrier a trough for the supply of wash water and weak solution is supported, this trough, as shown in Fig. l, bein of double form and consisting of a portlon on each sideof the central partition 30. To the left hand' compartment of this trougha ,pipe 31 leads to supply weak solution which passes under'the battle plates 32 and over a Weir 33 onto a vertical plate 34 havingl a serrated edge depending below the mainy portion ofthe trough so that the'v Vweak solution will Vrun down this plate' and will be delivered from the points thereof ontothe surface of the carrier from side to side ofthe same. This weak solution will .flow in a film down the risingsideiof the carrier inthe direction of the arrows, in Fig. 16; This film of barren solution, therefore, Hows ldownward' over the rising lter pans, and when'one of these pans or compartments with the cake of collected material thereon reaches the point B',it isr sub-- jected to thesuction while thelm of bari i ren solution 1s flowing downward over this pan. The amount of thls solution or wash is so regulated that it is nearly all drawn l through the cake and filter pan, and any surplus that may escape downwardly `along the surface of the carrier will be caught in a trough 35,- and this willbe delivered separately from any other solution, it being too lowy in value for the precipitation of gold y therefrom. It maybeused, however, for l the treatment of fresh ore, going with it later into the main filter tank. To the other side of the upper trough a pipe 31 extends, and through this wash water is delivered to the trough which runs down over the serrated side plate and is delivered to the surface of the carrier, and flows thence down-m wardly over the descendingside ofthe said carrier, the purpose ofl this wash water be-' ying to displace the cyanide solution retainedas moisture in the cake, and this washwter,

.when the filter pan reaches the point C, will be subjected to the suction through the port 28, and will be delivered `through the pipe connected with said port and `.kept separate from the weak solution which is' delivered through the port 27. TWhen the rotation of from open-ing'28 and recess 28', and i 1s the -air condu-itflead'ingto opening29.

i 1,059,327I q `the carrier brings the filter pan'into communication with the port 29, in the stationary valvemember, this communication `taking place through the pipes 21 andl 22 above described, airvpressure will be admitted to .the filter pan through these pipes, and the eake of collected material will be blown off,

'leaving the filter'earrier clean before enteringthe'tank again. A scraper 364 is einployedfto assist. in 4this dislodgment of the j cake, and'cleajringvof the filter pans. The

trough 35 isp'rovided with a fiexible' member 35 connected with its edge and bearing r upon'the surface of the carrier, this fiexible portion being,A for instance, of rubber, thus forming a seal between the trough and the surface of the carrier which will insure the excess weak solutionbeing directed into the trough for separate delivery.

z It 'will be observed `that a single set of pipes are' employed, being used 'at one time for the suctionpperation and at another time for the air pressure delivery. It will be seen also that a single row of openings or ports are employed in the movable valve member, and that these ports are brought in succession to the several ports in the stay 'tionary valve member, and that this stationary valve member has a series of suction ports' for the delivery of the material passy ing therethrough .to separate points for different uses or` treatments.

A y 4 In other words, there is no mixing of the solutions flowing Athroughthe different ports in the stationary valve lnember, but these solutions are kept y separate and delivered separately.

' Asshown in Fig. 7, the filter pans at the edges 4 of the carrier are bounded by batten strips 37' secured by screws ingrooves in the surface of the carrier, and these-battens hold the Afilter material. l

-Referring to "Fig.`17,` 10a is the triinnion bearing,10bstuds, 10c a frame or spider held bythe studs, 10d a spring for holding the valve' 'plate against the rotating plate of the t-ri'in'nion. i

`Fig." 18 shows pipe e for` filtrate from opening 26, and recess 26', f is the conduit for:washsolutio-nufrom opening 27 and recess'27; g the conduit for wash Water I 'claim 'as' my invention .1.' A machinefor separating liquids from Viinaterials-andv washing said materials, comprising an endless carrier `with filter sec- .,tions, means for moving `said carrier, stationary. meansfor Vapplying the material `to said filterl'seetions, means for `applying a Washing medium to the material andmeans `for separating vthe filtrates which respectively pass through the rfiltering means 'bejfore reaching the point ofapplieation ofthe washing mediumV and after passing said point.

2. In combination a bat-h, a carrier having filter pans, means fordischarging liquid` onto the carrier,.suction connections, and a trough to receive the excess liquid from the surface of the carrier, said trough being on the rising side of the carrier and having a flexible portion bearing thereon, substantially as described."

3. In combination a bath, a carrier having filter compartments or pans with filtering material, and wire extending circumlferentially of the carrier and over the pans,

said `wire being secured at different points about the periphery of the carrier, substantially as described.

4. In combination a bath, a carrier having filter compartments or pans with filtering material, a metallic member or members extending across the surface of the carrier, and wire extending circumferentially of the carrier and over the pans, said wire being soldered to the metallic member or members, substantially as described.

5. .In combination a bath, a carrier having filter compartments or pans with filtering material, a metallic member or members ing over the division strips and battens fitted to the said recesses for holding the filter material therein, substantially as described.

8. A machine for separating liquids from materials and for washing and saturating materials with liquids comprising a cylindrical filtering surface, `means for rotating said surface, stationary means for applying the material to said surface, stationary means spaced from said applying means, for applying a :washing medium `to the material, and 'means for separating the filtrates which respectively pass through the filtering means before reaching the point of application of the washing medium and after passing said point.

9. A machine for separating liquids vfrom materials and for washing and saturating ,materials with liquids comprising a cylindrical filtering4 surface', means l:for exerting a suction within said surface, 4means for ro-4 tating said surface, stationary means for applying the material tosaid' surface, stationary means, spaced from saida'pplying means,

i for applying a Washing medium to thematerial, and` means for separating the {iltrates 'which 1respectivelypass, throughk the filtering-means beforereaching the point of application of the Washingmedium andjafter y ratediltrates -from the interior of the cylin,

dricalsurface duringvthe operation vof the l passing said point.

l0.` A machine for separating liquids from materials and for Washingand satnrating materials' with liquids `comprising a cylin-y drical filtering surface, means for exerting a suction Within said surface,means for. rotating said surface, stationary means for applying the material to said surface, stationary means spaced from said applying means,

for applying a Washing medium tothe materespectiyely pass through the filtering means before; reaching the .point of lapplication fof thewalsliing medium. and after passing said point-andfmensfor withdrawing` the sepa- -20 In testimony whereof, aixfmy I ture in'pre-sence of two witnesses. p n RANDALL P; AKIN'S. Witnesses: y

W. R. GABY; i

- JOHN E; ROTHWELL. 

